Abstract

Objective This study aims to analyze the outcome of free perforator flap for repairing soft tissue defects on the dorsum of foot. Methods Thirty-six patients with soft tissue defects on the dorsum of foot were treated at a single institution from March 2015 to September 2017. They were 20 males and 16 females, aged from 21 to 59 years old, with the mean age of 39.4 years. The causes of injury include crush injury (n=19), traffic injury (n=15), and electric injury (n=2). The injury site involves left foot (n=19) and right foot (n=17). The defect area of soft tissue was from 4.4 cm ×6.6 cm to 7.1 cm×16.2 cm in size. The vacuum sealing drainage dressing (VSD) was performed for all patients at the first stage of operation. The fracture and dislocated bone were fixed using Kirschner needle and plate screw. The ruptured tendon was repaired at the same time. The flap transplantation was performed at the second stage of operation. Twelve patients were treated with free anterolateral thigh perforator flap, 15 patients were treated with free sural artery perforator flap, and 9 were free peroneal perforator flap. The skin flap was from 4.9 cm× 7.2 cm to 7.9 cm × 17.8 cm in size. Results All 36 flaps survived. The wounds of both donor and recipient area primarily healed, without infection or skin necrosis. The venous crisis occurred in 1 patient of anterolateral thigh flap and 1 patient of free medial sural flap within 24 hours after surgery. Both flaps survived after stitches removed and blood cleaned. All patients were followed up for 6—22 months, with an mean follow-up period of 9.8 months. Except for the swollen anterolateral thigh perforator flap in 2 patients, the other patients were satisfied with the shape of flap and in wearing shoes. The sensation of flap was good, and the two-point discrimination was 11—16 mm. There was no obvious dysfunction occurred in the donor site. Conclusions The free anterolateral thigh perforator flap, free sural artery perforator flap and free peroneal perforator flap are suitable for repairing soft tissue defects on the dorsum of the foot. A reasonable surgical plan can help to obtain satisfactory clinical outcome. Key words: Surgical flaps; Soft tissue defects; Foot injuries; Repair

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